Perhaps you should try some spelling variations:
thien danh » thien dang, thien thanh, thien chanh
thien anh » tien anh, thien thanh, thien chanh
tranh van » tran van, trinh van, thanh van
van nhung » van nhuong, va nhung, van hung
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than cap » khan cap, thanh lap, thanh cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien danh) or (thien anh)) - canh tranh van nhung ((cong dan) OR (cong san)) than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien danh) OR (thien anh)) - canh tranh van nhung ((cong dan) OR (cong san)) than cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien danh) or (thien anh)) - canh tranh van nhung ((cong dan) OR (cong san)) than cap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien danh) or (thien anh)) - canh tranh van nhung ((cong dan) OR (cong san)) than cap*.